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US3521835A
Expired / Lapsed
US
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Synchronous satellite
Assignee: Massachusetts Institute of Technology
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Filing: 1967-06-05
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Granted: 1970-07-28
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Expires: 1987-06-05
Abstract
No abstract record available.
Inventors
- 👤 Alvise A Braga-Illa
- 👤 Walter E Morrow Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:01
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/24; B64G1/244; B64G1/247; B64G1/36; B64G1/363; B64G1/242; B64G1/2429; B64G1/365; B64G1/10; B64G1/1007; B64G1/361
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |